Drill jar



Nov; 10,1925- E. J. DUNIGAN DRILL JAR Filed June 25. 1925 ver-meets CQPY ?atented Nov. 10, 1925.

i e we HELDWARDLJ. 'DHNIGAN- OF MUS KDQEEQ:QKLAHQMA" e .7

BILL,

,To (LZZflUjZLOWL it may conCem-x ,Be it known that I, EDWARD ,Jgpn w eg m ,acitizen ofthe United fitetes residingxat Muskogeginthe county 7,01": Muskogee end A further object of theapresent invention iscto extend the knocking head the full length ofthetongue of eachj ar rnelnber to protect the tonglie and also censmtl eextension to assume apart of the jar ,and thus V render the. tongue more durable end gener2 11- 1y preserve the operzttivenessfand advantages of each tonguejat its-extremeend. c A t l tet e zebj .ei th Ptee n zi I we is to a-e ne 1 illy mhe. y h "adv k ee I e my prio reeturete di eleeed e-Y I the (above noted eppliee tion 3nd .1nete1 ia11 y eje l l- Tte h a v nta ie -ee 'dqetm etee kby re e t g-th :t nee ief ee hie emem ee e =u a d m j ie rlleet h :ienettee I over the i. entire. ,jar structure.

' Wit he en l i= biee fle ed-te ee i .e il hereinefree-e eeer in detail, th inventi n eeee eteinethel eeettu tion and arrengernel itpf thve several perts wh w .t "met "te ly e eeerihe l @flie su bj oined description endpointedout in the i appende aelaim In 'the ;drawings:

.Fig. 1 an elevation of the in protred rflL-j eemP e n du ie -eni i la Steteof Qldehome,hmze invented newe d ("Fi 5 ti a 'teenevere ee'etien; e h plin 'f ih iilep eved i .em iiee W k n em hers; A 24111: which are precisely f ddi i wetrne i e spu th h- 411e, d ta \vll e l i'b "1?re nt y ;P 1i, ef Th up extr i y ef m ber A is in the "town of 21f hody fi preferably cylindrical in cross section "and hejving fa screwthreaded socket 6 for atitechinentfof ia' conpling 'device et the lower end of its suspending gable, not shown. The 7 lower eX- tren ity of the lne nbei B is likewise in the ci f tmle be im ielyerlifi l m m .ie eeiee. ee ihev e wii w ee r' iwfi nippl 8 fe \ette hlee f e f r ii The bodies 5 and 7 ere respectiyely'fiorined ide seets forawreneh or spanner to hold "t me be z :eteei na y duri a ta hm n e deta hme flthe' suspending Gable n drill ng tool. iEaeh; fiend 7 has ta pziir Qf'IG iIiS ll and 12 extending therefrom and eevere'ely 'e et'te lie e jfli th tetm l .e t elet w in i t r ed en fir ef eee a 14:, the sa r in fl ieeeth i e peei e elrti i et eree e l n t side vy ells of the gel'ots cut jeway to 'forin le e'it di jeeets 115 h "said; see ite Iin jir-e... .t

P th eenA e te mina 1 d 4 livin L lisl t. we em me b eell e 112 r revers ly eee t ed, ze lth reenie ee (extrem y I1 ,@o th gnember ;11 is le ceted a'djaeent the body-,5 andthe.similarponyerged e;ct1:emity 59 h e l fi ib l tme b ll hi lee e e tre t en, th '1' memh t i tu it ileeie Fig. 3. is a similar iew withparts sllQWn ein elee ie e e ne e the i mem er emi q e reue t i ii et c h ,.4. 2enee ,of assembling the ,d ual nnits.

,Eig. A is e transverse section, .on the {line i i teee mblee tf h' wt rein m mbers, egehel feenttell i iee ieii l i e e li ii j eete 'er i i ttl ehee l' ith i ee Y e n iae t l ee e yt e -ee ith 11 eiv .ie e h Th eeee v. er ie w'by eu n he s.

awav, the opposite portions of each, rein Y easy movement "theseats and the ot fr lyeurvecl extremihe tongues, have their me e "are fdiregtly in r eads -19, hereinbefore 1nd coincidently Withthe ftrar l3" 't "shoulders 16, andotheinner *nds ofxthefl tongues 18 form; the; a terminal vWalls fer the slots 13 the" extremities of the latter oppo site the converged extremities 14 thereof. Theinner: opposing sides of the flanges 20 of the'heads are I Wards the outer terminals of the saidheads turo as the outwardly beveled extremities 17 of the saidi'seats 15 formed by cutting a he opposite portions ofthe rein meni- The outer ends 22 of the tongues 18 terminate slightly inside of the outer terminals ofthe heads 19, the outer surfaces of the heads and of the shanks 23 formed between the respective bodies 5 and 7 having a general convex contour, and, as hereinbefore indicated, the said bodies are also of the same contour with the exception of the square or flat faces 9 and 10. It will therefore be seen that the assembled reins conjointly provide a cylindrical jar whichwill be of a uniform diameter throughout its length in accordance with the diameter of the opening in which the improved jar is adapted'to operetc; The inneuterininals of the headswlt) which a are termed with the transnrersely straight shoulders 16 have a positive square abutting operation and the engagement of the outer ends. of the same heads with the outwardly conceited curved terminals 01 the seats iainsure an "abutting check, when the heads 119 shitt longitudinally, but the abuti tingengagementatthis portion of the improved jar will be 'easy with respect to the a two rein memberain view of thecurvature Y of the extremities 17 of the said seats and'the corresponding curvature of the extremities V 21' of the flanges 20 of-the said heads. The v outer endsfi tof the saidheads a'reregularly curved or eontil'ine inasemi-elliptieal 1 from one side to the fother: therebf, or re or ex etly th same contour the outwa dly curved terminals 17 "of (the seats l55so'that;

there will be a snug fitting off these COOpefatfl i Q mg parts. "The movement ofjthe outer curred ends with the flanges 20 having their front extrem ties formed with convex bevels a 21 ashereinbefore" explainech when the said part or the shoulders 16 heads are force I p as shown by, Fig.3, will den check or abrupt eontaetandlpre- "'ent'ly with the outward limit i lually floom'erged to- I 'te rial p I x I up aportionot the shock or jar but ivithen easyaotion, as also he inbefore specifiedyand thereby 'minate a x a V 5 119, the said tongues are 05 strengthened and less liable to beoome 1,5ei,41o

the heads with, relation to After'its application at one end to a cable tool, as is customary, it is reoiprocated through theaotion of well known mechanism in well boring operations, and when the jar dese nds the two links or rein members come together the'nioment the drill tool strikes an obstruction," and upon elevation of the through the cable for further impaotof the drill tool with respect to the material being bored, the links or rein members separate. When the two links or rein members close at the time of impact of the drill tool with the material bored, the transversely straight shoulders 16 come together and uniformly distribute the impact stress relatively to the jar at opposite sides of the latter, and when the links or rein members open, the outer rounded ends of the heads 19 gradually move into the outwardly curved inclined extremities of the seats 15 with an easy: action in View of the structure of these I ooper ating parts as hereintheyfare primarily 1 separate and subsequent to assemblage as shown in the drawings the members are rendered continuous? and in; a. separably connected by "Welding: the joints along the lines It is proposed to form thelinks or rein members of suitable hard inateri lor me V to ,soyrproportio the slots liia'nd tongues l8 that there will be an 7 easy sliding movej .aent with minimized lateral play, and the apered or reduoed extremities 25101 the a ,ongue willentertheredueed or taneredexas to ithstand wear and tremi i 14 of j the slots without istioking,

and by this means an alternateopening and Volo'sing movement of the links 'or rein nlni: 3

bere v w ldin" joint along the lines de ia dtrxri as vshownby Figs; 1

ll be sensitivelyeffected." i a and 2 with the angleof the weld outermost towards the screw-threaded nipple 8 for1n-- ing the terminal ot the body 7 of the mem ber B. This form of w'eldedf joint is ma dvantageous in its location and It will be noted that treme 'f felines 17 adjacent the converged extremities 14 ottherslots l @fiang'es QO OfT th' the WQldi-Kl joint, "due to th I Q act as'a braemgmeians on both sides otthe "Weld seam, and by this means any expansion and the terminals of the heads 19 t that the operation of the i present, in'iprovedm ar; will be obvious.

ve to protect i caused by the tongues in the jars now in use is prevented.

What is claimed as new is:

l. A jar of the class specified comprising two duplicate link members each having a body with inwardly projecting reins with centrally disposed longitudinal slots extending partway of the length thereof and terminating in inner transversely straight shoulders from which seats on opposite sides of the slots extend towards the body and terminate in outward curved concave extremities, the reins having their in ner ends shaped as heads with rounded free ends and having tongues centrally disposed therein and of less width than the heads to form flanges which are slidable in the said seats, the tongues terminating inwardly a distance from the free rounded ends of the heads, the heads being wider than the remaining portions of the reins.

2. A drill jar of the class specified comprising duplicate link members having slots extending longitudinally partway of the length thereof and terminal heads with transversely extending tongues, the link members having their inner portions formed as reins terminating in the said heads and engaging seats along the slots, the seats having at one end terminal outwardly inclined concave extremities and the heads being movable in the said seats flush with the adjacent parts of the respective link members, the heads and tongues of the respec' tive link members also being disposed at right angles to each other and the heads on opposite sides of the tongues having flanges terminating in outward reduced curved bevels adjacent the outer ends of the tongues to fit in and have an easy checking action to the closing movement of the link members by engagement with the out wardly curved extremities of the seats, the heads having opposing transversely straight shoulders which abut when the link members are pulled into open position or separated for a portion of their lengths.

3. A drill jar of the class specified comprising duplicate link members having inner slidingly associated elements consisting of heads with transversely extending tongues and longitudinal slots engaged by the tongues, the tongues terminating within the ends of the heads, the tongues and slots having reduced extremities for inter-v fitting sliding action, the parts of the link members adjacent the extremities of the slots opposite the reduced extremities of the latter having straight transverse shoulders which have abutting contact when the link members are pulled longitudinally and opened, the free ends of the heads on the opposite sides of the tongues being reduced and formed with curved bevels and the members adjacent the reduced extremities of the slots having outwardly curved seat portions for engagement'by the free extremities of the heads.

In testimony whereof I have hereunto set my hand.

EDWARD J. DUNIGAN. 

